Underwood will join Celine Dion, Jennifer Hudson, Smokey Robinson and Usher in the Jackson tribute, which will use never-before-seen 3-D footage that Jackson created for "Earth Song" as a centerpiece of his "This Is It" tour.

"It was one of the most important portions of the concert tour to Michael, and when Michael saw the film for the first time at his last rehearsal, there were tears in his eyes," said Grammy co-executive producer Ken Ehrlich, a longtime associate of Jackson's.

The segment will be a technical breakthrough: It'll be the first time a major television show broadcasts in 3-D. CBS and Target have partnered to provide millions of 3-D Grammy glasses, available at no charge at Target stores.

The show will be televised live on CBS from the Staples Center in Los Angeles, from 7-10:30 p.m. Central. Check back here throughout the week (and following) for ongoing coverage of the Grammy Awards.